From a - sequence to the end of the line. I would rather write a new rule (maybe even on PL1) to catch these extensions, than to extend all sql rules. MySQL Server supports three comment styles: From a character to the end of the line. The rule 942440 from PL2 catches both /*! and */ independently. In my opinion this is not a very commonly used, legitimate string. It is therefore possible to use it in the middle of an SQL query without any problem. will work for any situation where you want to start and end. Multi-line comment has the advantage of being able to indicate where the comment begins and ends. To add comments in MySQL, you can use the following symbols: / / or or (double-dash). It does not affect the final output as long as it comes before or after a definite pre-programmed character. ĬREATE TABLE t1(a INT, KEY (a)) /*!50110 KEY_BLOCK_SIZE=1024 */ īut the minimal string needed to trigger the regexp is: /*!*/ or /*+*/. The comment function will let you write any text to add a comment in MySQL. Ex- Find the below alter command which will add address column to user table after. SELECT /*! STRAIGHT_JOIN */ col1 FROM table1,table2 WHERE. We can do this easily by using COMMENT attribute in alter command. The right payload to use with curl is curl -v " (I've encoded ` with %60 and escaped Having a bypass at PL1 but being detected at PL2 is inline with out project goals.īut it goes without saying that changing a rule to detect this (as well) could make sense if we can avoid false positives. ![]() Other than that, detecting on PL2 is not that bad. Code language: SQL (Structured Query Language) (sql) Here, everything after the sign is interpreted as a comment. ![]() ![]() SELECT FROM table this is a select statement comment. So 942100 detects this just fine in my case.Ĭan you guys give me a naked curl call that bypasses CRS and still executes? Following are three syntaxes to use comments in MySQL. 942100 PL1 SQL Injection Attack Detected via libinjectionĩ42200 PL2 Detects MySQL comment-/space-obfuscated injections and backtick terminationĩ42260 PL2 Detects basic SQL authentication bypass attempts 2/3ĩ42490 P元 Detects classic SQL injection probings 3/3ĩ42431 P元 Restricted SQL Character Anomaly Detection (args): # of special characters exceeded (6)ĩ20273 PL4 Invalid character in request (outside of very strict set)ĩ42432 PL4 Restricted SQL Character Anomaly Detection (args): # of special characters exceeded (2)
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